Building turbos with spare parts

[architechnik]

I'm replacing my 14b with another used, as the exhaust/turbine housing is cracked.

While perusing the net, I noticed that Turbochargers.com offers compressor wheels and turbine housings for reasonable prices... *ding* (light bulb)

http://www.turbochargers.com/store/product_info.php?cPath=38_49&products_id=369
http://www.turbochargers.com/store/product_info.php?cPath=38_49&products_id=384

I was wondering if the Mitsu 16g would fit in the compressor housing - does anyone have any experience with something like this?

I'm not worried about the amount of time, just the $$... and an upgrade for a nearly new (with rebuild and balance) 16g would be nice.

 

[dsm-onster]

All the 16g comprssor wheels have a compressor back plate w/ different dimensions. Of course the 14b compressor housing has tp be machineed to fit the 16g wheel. Add the backplate costs and the 7cm^2 turbine housing (you'll need this to get any decent number out of a 16g compressor), now you have an unbalanced turbo for the same price as a used 16g. . .

 

[JusMX141]

I'm 99% sure that the compressor wheel and turbine wheel/shaft are balanced separately on the 14B and then assembled together.

If this is the case, by rights you could put any pre-balanced Mitsu Compressor wheel onto a TD05H shaft, put them together, and they should be within reasonable axial balance. I've done it in the past with many Mitsu turbos- including the 20G on my buddy's 1995 TSi AWD, with no problems.

 

[JusMX141]

One more reason I believe this theory is when I buy my rebuild kits from a certain supplier, I have a deal worked out where I'll ship them the turbine and compressor wheels and they will rebalance them for free with the purchase of a rebuild kit. The only thing I have to pay is shipping.

The supplier balances the parts individually so when I install them it doesn't matter how they align on the turbine shaft; they're still perfectly balanced.

 

[dsm-onster]

Turbo Comparison from vFaq.com sheds some light on installing a 16g wheel in a 14b. The back side of a 14b compressor wheel has a different gometric shape than a 16g. . . Scroll down to the bottem and you'll see a picture. I don't know of anyone who has simply swapped a 16g wheel into a 14b. The backplate obviously has to be altered or swapped as well.

I've heard of more than one guy gett away w/ not balancing a rebuilt 14b. Perhaps the whole assembly doesn't have to be balanced. Considering jusmx141 success, I would use his particular supplier . . .

Nevertheless, my MHI built small 16g compressor has a balance cut on the nut in the red oval (sorry for the crappy pic):

 

[JusMX141]

Considering jusmx141 success, I would use his particular supplier . . .

The key is to hook up with someone who has access to new takeoffs. Shops like FP have to do something with their new Small 16G compressor wheels and TD05H turbines when they build their 18G-6SL2's, right?

Well, maybe that was a bad example....FP probably reboxes them and sells them as new for $237.50.

 

[dsm-onster]

Well, maybe that was a bad example....FP probably reboxes them and sells them as new for $237.50.

That's likely!

 

[architechnik]

I guess while pricing all the parts, they do end up adding to be more than just a complete one. I'm somewhat of a tinkerer, so trying to build these things myself is like buying a model kit.
I just need the cheapest version to play with

$237.50 huh? Maybe I'll just take apart my old one and sell it on e-bay and pretend I didn't know they were used parts... no, no. There are enough shady people on e-skrew already.